\section{Simulation Setup}
To test the responsiveness and reliability of the 3G mobile communication technology a simplified test-scenario was set up to simulate the "Smart-Grid" scenario's communication conditions. The setup was build to eliminate most of the external influences on the scenario which are not in the scope of the test.
\subsection{Ueberblick}
%TODO HIER EIN SCHAUBILD ERSTELLEN, WELCHES DIE ZUSAMMENHAENGE AUFZEIGT. ANHAND VON DIESEM DAS SZENARIO ERKLAEREN.  
The test setup consisted of a B\&R - APC 510 IPC running the server application. The server uses IP white listing to accept only packages from the routers of the test scenario. Before accepting a incoming data package, the hash value of the package is evaluated to prevent package modification or spoofing. By evaluating the sender time-stamp all packages that are older than 10 seconds are logged as invalide packages while the others are stored as valid data. To achieve consistent and comparable timestamps each client router as well as the server are synchronized by the same NTP-Server.
\\\\
%TODO check exact router names
For the client routers we used a setup of two Insys - MLR and one TDT - C1500 VPN mobile routers. These routers where setup with subscriber identity modules (SIM) from different providers to be able to highlight the provider- and hardware dependence separately. 

%TODO do we realy need the hardware spec?
\subsection{Hardware}
\subsubsection{Router}
\paragraph{MLR}
MLR von Insys beschreiben.
\paragraph{TDT}
TDT beschreiben.
\subsubsection{Server}
Normaler Windows 7 Rechner mit entsprechend konfigurierter Firewall, sowie einer Java-Runtime.
\subsection{Software}
Hier wird die Server und Client Software besprochen. Der Aufbau der Daten wird entweder eingeflochten oder in einem eigenen Unterpunkt besprochen.
\paragraph{Client}
Warten auf Abnahme des Sequenzdiagramms. Spaeter anhand diesem die Software erklaeren im Groben.
\paragraph{Server}
Warten auf Abnahme des Sequenzdiagramms. Spaeter anhand diesem die Software erklaeren im Groben.
